Fatal error: Call to undefined function oci_connect()

Solution 1:

Things to check:

• You don't need to set LD_LIBRARY_PATH nor ORACLE_HOME. However, you need to add D:\instantclient_11_2 to the PATH environmental variable and restart the computer so changes apply.

• Before configuring PHP, check that your Oracle client libraries actually work (for instance, try to connect with SQL Developer).

• Comment out the extension=php_oracle.dll. It belongs to the old and deprecated Oracle extension.

• Double check that the php_oci8.dll file is really at c:\php\ext\php_oci8.dll?

Solution 2:

Did you restart apache after putting the php_oci8.dll file in your php/ext directory?